[Upgrading, Modifying and Unlocking] trueg:
Does anyone have any suggestions?

I also tried the GW820 v10g ROM found here....

http://www.lg.com/us/mobile-phones/Resources/GW820AT-01-V10g-310-410-APR-16-2010+0.exe

Original ROM

C:\[LG] kitchen_2.2\Temp>DZDecrypt.exe -x rom.dz
DZ-Decryptor v1.0b *ALPHA RELEASE* by BIGB0SS from COPS.

[■] Opening file "rom.dz".
[■] Allocated memory: 280 Mo.
[■] Unpacking informations:
- Unpacking "amss.mbn" (Packed:0070D582 - Unpacked:00E4B000).
- Unpacking "partition.mbn" (Packed:000000B4 - Unpacked:000001D0).
- Unpacking "appsboot.mbn" (Packed:00031CAC - Unpacked:000B3028).
- Unpacking "flash.bin_temp0" (Packed:00B9F447 - Unpacked:01000000).
- Merging "flash.bin_temp1" (Packed:00D38474 - Unpacked:01000000).
- Merging "flash.bin_temp2" (Packed:00CD48BB - Unpacked:01000000).
- Merging "flash.bin_temp3" (Packed:00C8F36B - Unpacked:01000000).
- Merging "flash.bin_temp4" (Packed:00DBE916 - Unpacked:01000000).
- Merging "flash.bin_temp5" (Packed:00D274A3 - Unpacked:01000000).
- Merging "flash.bin_temp6" (Packed:00CE0594 - Unpacked:01000000).
- Merging "flash.bin_temp7" (Packed:00DD8A93 - Unpacked:01000000).
- Merging "flash.bin_temp8" (Packed:00E26995 - Unpacked:01000000).
- Merging "flash.bin_temp9" (Packed:00E689D3 - Unpacked:01000000).
- Merging "flash.bin_temp10" (Packed:00EAC6CE - Unpacked:01000000).
- Merging "flash.bin_temp11" (Packed:00E4F56B - Unpacked:01000000).
- Merging "flash.bin_temp12" (Packed:00E8E51D - Unpacked:01000000).
- Merging "flash.bin_temp13" (Packed:00576CBC - Unpacked:0083C6DF).
- Unpacking "apps.mbn" (Packed:00000014 - Unpacked:00000000).
- Unpacking "dbl.mbn" (Packed:00003141 - Unpacked:00008270).
- Unpacking "fsbl.mbn" (Packed:00013AE4 - Unpacked:00028E98).
- Unpacking "osbl.mbn" (Packed:000297C3 - Unpacked:00054E74).
- Unpacking "dsp1.mbn" (Packed:002BDCE0 - Unpacked:0074A1B4).
- Unpacking "fwua.mbn" (Packed:00006E36 - Unpacked:0000A43C).
[■] SubFiles: 0x0BF80084. (DzCreator)
[■] Closing file "rom.dz".

DZCreate.ini

[main]
workmem=280
[GW820G]
Chipset=QSD8650
SplitSize=0x01000000
SubFiles=0x0BF80084
SubFileType03=amss.mbn
SubFileType08=partition.mbn
SubFileType14=appsboot.mbn
SubFileType15=flash.bin
SubFileType16=apps.mbn
SubFileType17=dbl.mbn
SubFileType18=fsbl.mbn
SubFileType19=osbl.mbn
SubFileType1A=dsp1.mbn
SubFileType1C=fwua.mbn

Creating newrom.dz

C:\[LG] kitchen_2.2\Temp>DZCreate.exe -mGW820G newrom.dz

DZ-Creator v1.0c *Alpha release* by BIGB0SS from COPS.

[■] Specified phone model: GW820G (GW820G).
[■] Specified version info: newrom.
[■] Creating file "newrom.dz".
[■] Creating DZ Header...
[■] Packing subfiles...
[■] Pack "amss.mbn"... (Unpacked:00E4B000 - Packed:0070D582).
[■] Pack "partition.mbn"... (Unpacked:000001D0 - Packed:000000B4).
[■] Pack "appsboot.mbn"... (Unpacked:000B3028 - Packed:00031CAC).
[■] Pack "flash.bin"... (Unpacked:0D83C6DF - Packed:0B56AFF8).
[■] Pack "apps.mbn"... (Unpacked:00000000 - Packed:00000014).
[■] Pack "dbl.mbn"... (Unpacked:00008270 - Packed:00003141).
[■] Pack "fsbl.mbn"... (Unpacked:00028E98 - Packed:00013AE4).
[■] Pack "osbl.mbn"... (Unpacked:00054E74 - Packed:000297C3).
[■] Pack "dsp1.mbn"... (Unpacked:0074A1B4 - Packed:002BDCE0).
[■] Pack "fwua.mbn"... (Unpacked:0000A43C - Packed:00006E36).
[■] Writing offset table...
[■] Updating DZ Header...
[■] Closing file "newrom.dz".
[■] DZ-File created successfully.

Dump of newrom.dz

C:\[LG] kitchen_2.2\Temp>DZDecrypt.exe -x newrom.dz
DZ-Decryptor v1.0b *ALPHA RELEASE* by BIGB0SS from COPS.

[■] Opening file "newrom.dz".
[■] Allocated memory: 280 Mo.
[■] Unpacking informations:
- Unpacking "amss.mbn" (Packed:0070D582 - Unpacked:00E4B000).
- Unpacking "partition.mbn" (Packed:000000B4 - Unpacked:000001D0).
- Unpacking "appsboot.mbn" (Packed:00031CAC - Unpacked:000B3028).
- Unpacking "flash.bin" (Packed:0B56AFF8 - Unpacked:0D83C6DF).
- Unpacking "apps.mbn" (Packed:00000014 - Unpacked:00000000).
- Unpacking "dbl.mbn" (Packed:00003141 - Unpacked:00008270).
- Unpacking "fsbl.mbn" (Packed:00013AE4 - Unpacked:00028E98).
- Unpacking "osbl.mbn" (Packed:000297C3 - Unpacked:00054E74).
- Unpacking "dsp1.mbn" (Packed:002BDCE0 - Unpacked:0074A1B4).
- Unpacking "fwua.mbn" (Packed:00006E36 - Unpacked:0000A43C).
[■] SubFiles: 0x0BF80084. (DzCreator)
[■] Closing file "newrom.dz".

If I flash newrom.dz to my phone, it doesn't boot. :(